[Elecraft] Calibration of KXV3 module

[James Sarte]

Hi Eric,

Yes, I stand corrected.  I will use a 50 ohm dummy load with an SO239 to BNC
adapter when it comes time to calibrate.  Also, someone suggested using a 50
ohm terminator plug as used in computer networks.  That sounded like a
pretty interesting idea.

73,
James KC2UEE

-----Original Message-----
From: Eric Swartz - WA6HHQ, Elecraft [mailto:eric at elecraft.com] 
Sent: Wednesday, February 11, 2009 6:17 PM
To: plcmark at gmail.com
Cc: kc2uee at gmail.com; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Calibration of KXV3 module

This will not work. The HT antenna is almost guaranteed -not- to be 50 ohms,
especially at the nominal 28 MHz output of the xv port. 

The only place this antenna will be even close to resonance is at its
operating fequency (I'm assumung 144 or 432 MHz). And HT antennas are
notoiously variable in their actual impedance, since it usually depends on
the interaction with you body when you hold the HT.

You need a 50 ohm resistive termination. 

73,

Eric
_..._
-----Original Message-----
From: Mark Bayern <plcmark at gmail.com>
Date: Wednesday, Feb 11, 2009 1:49 pm
Subject: Re: [Elecraft] Calibration of KXV3 module
To: James Sarte <kc2uee at gmail.com>
CC: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>

Will the stubby helical whip really be 50ohms at the freq out from the
XVTR OUT jack? Are you willing to bet your calibration on it?

Mark  AD5SS

On Wed, Feb 11, 2009 at 3:26 PM, James Sarte <kc2uee at gmail.com> wrote:
 Dear group,

>

> Page 50 of the user manual states that a 50 ohm resistor should be
attached
 to the XVTR OUT jack for calibration.  If I don't have a resistor, can I
use
 a 50 ohm BNC stubby HT antenna instead since output is only 1 mW?

>

> 73,

> James KC2UEE
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